I dunno. 'On your CD you sang "mwalahee yabdallagoondoh" but just now you sang "mwalahee yabdallageendub" - which is right?'.

Decoupling the part of your speaking apparatus that makes noises from the part of your brain that makes sense puts you into an interesting state of consciousness. It's like there's some never-discussed taboo you're breaking. It's easy to see how doing it as a group ceremony (as holy rollers do when speaking in tongues) would be a bonding experience.